.hn-form {
  max-width: 400px;
  margin: 1em 0;
}
.hn-input {
  width: 100%;
  padding: .5em;
  margin-bottom: .75em;
  box-sizing: border-box;
}
.hn-checkbox {
  display: block;
  margin-bottom: .5em;
}
.hn-button {
  display: inline-block;
  padding: .6em 1.2em;
  background: #0073aa;
  color: #fff;
  border: none;
  cursor: pointer;
}
.hn-button:hover {
  background: #006799;
}
.hn-success {
  color: green;
  margin-top: .75em;
}